I have this, too - for the last... 15 years, and it wasn't even much different before, either.
I'd say a lack of understanding on both sides is where it stems from. Key members of this family have died, and this has broken communication a bit.
We're all a long way apart. I don't want to end up with things getting worse. We do meet, but mainly for funerals! My age gap has made me the distant one. Dad is likely to have the next funeral. I think we'll all best off not talking. The family are ALL girls.
I don't see any sense in retracing behaviour for 15 years, but Saskia, if you're claiming this cutoff as quite recent, I'd want to make some moves towards reconciliation.
A sister-in-law said to me, just as I was about to leave home for university: "You can't choose your family, but you can choose all your friends." Other sisters-in-law always had worries about me ever finding a girlfriend, so they were wrong about that, and this is one of the reasons behind their view of me to not want to talk much more, all that time ago...
I'd say: "I can choose if I want to talk to my family!" Assuming things about people who you hardly know is not so good